At Future City, Eggman broadcasts himself onto a large television monitor, which previously read 'Air Board Festival'.

"Oh, hohohohoho!" Eggman laughed.

"Eggman!!!" Sonic, Y/N, Tails, and Knuckles shouted in shock.

"Ladies and gentleman! Welcome everyone! I hope you're all ready for a show; we've got an exciting event, just for you. Hohohohoho! Since you all seem so bored, I put together a little something extra to spice things up! I call it the "EX World Grand Prix"; a tournament to see who's the best of the best with Extreme Gear. Not just a race, but a special race, to see who's the fastest. And... these races are no-holds-barred! All contestants pay a simple entry fee of one Chaos Emerald and the winner takes it all! So, let's see who among you dares to meet this challenge!"

The monitor goes back to its previous Extreme Gear advertisement.

"Eggman again! Just what is he up to this time?!" Sonic glared.

"Probably something stupid." Y/N guessed.

Eggman reappears on the screen.

"And there's more! Before I forget, I'll present the current contestants. These players, they're hot; the best racers I could find!"

The three individuals from the previous night appear on the monitor, along with the statistics for their Extreme Gears; Storm the Albatross (grey) - An anthropomorphic albatross of hulking physique with grey feathers and white feathers covering his body. He has blue eyes, a gold beak and his hair is short but similar to Wave's hair. For attire, he wears tan gloves with black bands, small yellow goggles, a necklace with small gray pieces, and black, yellow, white and grey sneakers with sock-like cuffs.

Wave the Swallow (purple) - An anthropomorphic swallow with light purple and dark feathers that cover her body and head. Her hair is styled like a pair of long braids. She has a curved beak, cobalt eyes and two tail feathers. For attire, she wears white gloves with golden bracelets and red lining, a white tube top and flare-designed trousers. She also wears red boots with white accents, a necklace with a red gem and gold glasses.

And Jet the Hawk (green) - An anthropomorphic hawk with emerald green and dark emerald green feathers covering his body and white feathers on his front torso. He has blue eyes and a golden beak. His hair is styled like a mohawk with dark green tips. He also has three tail feathers. For attire, he wears a pair of white gloves with red and black cuffs, red, black and white boots with gray soles, and yellow and white goggles with gray strapping. As Jet's information comes up on-screen--

"Hey, that's...!" Sonic's eyes widen. "The EX World Grand Prix, huh? Let's do this!"

"Heck yeah!" Y/N fist pumped.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In Future City

"Ready for this, sis?" Sonic said, taking out his blue Extreme Gear Tails made for him and Y/N.

"Oh, yeah, bro!" Y/N nodded, holding onto her Extreme Gear as she puts on her goggles.

When the timer went off, the hedgehog siblings immediately ran and jumped onto their Extreme Gear as they flew off. It was hard at first, but after learning how to control their hoverboard, they managed to get used to it. They dodged all the competitor robots to get pass them throughout the race. They were having so much fun as they jumped up in midair, doing some moves that are rad, and landed. After three laps, both the hedgehog siblings made it first place at the same time.

"This is fun!" she smiled in joy.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Before Sonic, Y/N, Tails, and Knuckles met Jet, Wave, and Storm, the airship is flying near a couple of mountains at night as Eggman approaches from behind in a small machine. Inside Jet's room, Jet is holding his control box. As Storm runs to the door from outside, his feet thump loudly on the floor; reaching the door, he abruptly flings it open.

"Hey, boss!"

"Wha--?!"

Jet falls out of his seat. Storm bangs on the desk.

"We've got MAJOR trouble!!"

Wave walks up to the side of the door.

"Storm! At least learn to knock before entering a room."

Storm, looking back, shrugs. He picks Jet's control box up off the table.

"What's this? Oh, is this...?"

Jet stands up.

"Yeah. That's when I took over things for my father."

"So is this the key to the fabled Babylon Garden?" Wave asked.

"I wonder... Could it be true? Could our ancestors have left behind hidden treasure that's just waiting to be discovered?" Storm asked.

Jet nods.

"Hmm..."

Wave reaches for the control box, but Storm pulls it away.

"Uh-uh! If you get your greasy little hands on this, you'll probably use it in some crazy experiment of yours!"

"Oh, come on; I only want to look at it."

"You always say you ONLY want this or that!"

Jet sits down. As Storm talks, Jet looks progressively more annoyed and impatient.

"Remember the teachings of our ancestors, 'Be careful what you ask for, ultimately you'll only get three true wishes.'"

"Oh, be quiet! Why'd you burst in here anyway?!" Jet snapped.

"Well, uh, an egg head? Egg, salad? No..."

Wave puts her arm in front of Storm.

"Someone called Eggman wants to speak to you."

Storm pushes Wave aside.

"He told me that he has an interesting proposition for you."

Wave pushes back.

"Stop interrupting. Knock it off!"

They turn their back to each other.

"Hmph!"

"A-hem!" Jet sighed.

Eggman walks in.

"Ahem... am I interrupting anything?"

"So then, I heard you wanted to see me?" Jet asked.

"Are you Jet, the legendary Rogue? Your reputation precedes you. I've heard so much about your infamous group."

"Enough! What do you want?"

"Well now, I heard a rumor, a rumor that you have the key to Babylon Garden. Now, could this be true?"

Eggman looks at the control box in Storm's hand, light flashing across his glasses. Storm notices; hiding the box behind his back, he whistles innocently.

"Huh? What's this key?"

"Ho ho ho ho! Really now, you don't have to be so distrusting... Were you aware of this? I imagine not, yet. The key to Babylon Garden is..."

Eggman moves over to Jet, finishing his sentence by whispering.

"Heh. So let me get this straight, we just need to collect all these Chaos Emeralds, right?"

Eggman nods.

"Sounds easy."

"You really think so, eh?"

"What do you mean? Are you saying the Babylon Rogues aren't capable of stealing some puny emeralds?"

"No, of course not. But... have you seen this character before?"

Eggman presses a few buttons on his coat's left arm's wrist, producing a hologram of Sonic which displays statistics about him.

"He's called Sonic, and said to be the fastest creature on Earth. I've had many, many dreadful encounters with this pest."

"Hmph. He may be the fastest creature on the ground, but in the air, with me and my Extreme Gear, he's just a joke." Jet smirked.

"Oh, and before I forget. There's also someone else you should REALLY be more aware of. She's..." Eggman shivers. "...very scary and so... intimidating."

"She?" Jet raised his eyebrow.

"Oh? Is she cool like me?" Wave asked excitedly.

"I wouldn't say that, but sure she is."

Sonic's hologram changed to Y/N with statistics about her.

"She's Sonic's sister called Y/N. She's not the fastest like him, but with her genious, she can roller skate fast like Sonic with rockets. But that's not all. She's a sword and whip fighter, skate boarder, and has a power to wield the crystal."

"Huh. She looks nothing scary or intimidating." Jet said, tilting his head in curiosity of her character.

"I say I like her already." Wave said.

"Oh, believe me. Just be careful with her." Eggman warned.

"Alright. Even if she's fast, there's nothing she can do to beat me. Ah ha ha ha ha!"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Back to Sonic, Y/N, and their friends as they are walking across the bridge in the forest where there's a big waterfall behind them.

"Yeah, but what exactly is Eggman really after?" Knuckles asked.

"Aw, it can't be anything too important." Sonic said.

"Don't jinx it, Sonic. There's always something important that Eggman will always get his hands on." Y/N said, glancing at him.

"Oh, right... Sorry."

"Hey, Sonic!!"

They turned to see a familiar pink hedgehog as she ran towards them.

"Huh? Amy...?"

Sonic's eyes droop; Amy runs up to him, screeching to a halt.

"Don't tell me you've signed up too?"

"Of course. It really looks exciting and fun. Why wouldn't I join? And besides... this way, I'll be able to keep my eyes on you." Amy said and winked at the end.

"Ugh."

Sonic looked at his sister for help trying to get Amy to leave him alone. Y/N giggled and didn't bother helping much to his dismay. She noticed Tails is looking at Sonic's board.

"Tails?" she asked.

"Hmm... That mark..." Tails said, remembering see the emblem on Storm's board.

"Mark?" Sonic questioned.

"Uh-huh. I think it was on the boards of those guys we ran into in Future City. ...Babylon..."

"Babylon?" Sonic, Y/N, Amy, and Knuckles questioned.

"Yes; the mark of the Babylon Rogues. A long time ago, there was a floating island known as Babylon Garden. Supposedly, robbers lived there. According to rumors... this "legendary" band, the Babylon Rogues, were great thieves." Tails explained. "Legend also says that the Babylon Rogues incurred the wrath of the Gods because of their crimes, and that the island was cast into the depths of the Earth. After that, supposedly the Babylonians were then scattered for all time, never to be found. But they say that the Babylon Rogue's treasure still remains on that island, waiting to be discovered. There are also rumors that the Babylon Rogues were Extreme Gear specialists."

"Woah..." Y/N awed at the legend.

"Still, how can a plank like that just float?" Knuckles asked in confusion.

"That's easy to explain. According to the Kutta-Joukowski Lift Theorem, the control surface flow is balanced by the inverse kinetics of the--"

Knuckles' eyes start spinning. Y/N silently giggled, knowing that he gets overwhelmed with a long explanation that he clearly doesn't want to hear.

"STOP!! I get it, okay?! It just floats and that's good enough for me!"

"Ah-hahahaha!"

They turned to see Wave as she walks up to them.

"Huh?" Knuckles questioned, turning to her.

"Sorry, but it's just too funny!"

Wave turned to notice Tails holding Sonic's Extreme Gear while Y/N held hers.

"Huh? That Gear's unusual."

"Customized it myself." Tails proudly said.

Wave picks it up. Y/N though noticed that she placed something under Sonic's board as she turns it around, making her narrow her eyes in suspicion.

"Hmm! Hahahahahaha!" she laughed. "Well, I never imagined anyone would enter the race with such a piece of junk. Hahaha!"

Wave hands it back to Tails.

"Thanks though. It was good for a laugh. See ya, shorty!"

Wave walks away. But Y/N was not letting her get away with the insult she gave Tails. So she ran up and stopped in front of her.

"Don't think you can get away with you insulting my friend. Also..." she leans in surprising Wave. "I don't know what you're trying to pull or what you just placed under my brother's board, but there's no way you and your birdies are going to win. We are."

Wave flinched for a moment before she started laughing even harder.

"Man, you sure have a good eye and fiesty! No wonder Jet finds you intriguing."

"Huh? Jet? You mean that green fellow?" Y/N questioned.

"Duh! And I don't know what you're talking about." Wave smirked with a lie. "Wish you could join us. It will be much more fun with you."

With that, she walks past Y/N. She looked to where Wave have gone and scoffed, walking back to her group.

"Oh that girl! Who does she think she is?!" Amy glared.

"Yeah! How can she just walk in and diss Tails?" Sonic agreed.

"I know! And tinkering's all he's really good at, too." Knuckles said.

"She's got a lot of nerve. You okay, Tails?" Y/N turned to him.

Tails, looking in Wave's direction, appears infuriated, surprising her. She then smiled that he's not letting anyone bring him down anymore.

"The next race is about to begin. Please come to the gate, participants!" Speaker said.

Sonic, Y/N, Tails, Knuckles, and Amy all start running to the gate.